Wireless-telegraph system.



No. 7|0,|22, Patented Sept. 30, I902.

H. SHOEMAKER.

WIRELESS TELEGRAPH SYSTEM.

(Application filed 11, 1902.)

4 Sheets-Sheet I.

(No Model.)

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No. 7|0,|22. Patented Sept. 30, I902. H. SHOEMAKER.

WIRELESS TELEGRAPH SYSTEM.

(Application filed Jan. 11, 1902.)

(No Model.) 4 Shee ts-Sheet 2.\

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N0. 7l0,'l22. Patented Sept. 30, I902. H. SHOEMAKER.

WIRELESS TELEGRAPH SYSTEM.

(Application filed Jan. 11, 1902.)

4 Sheets-$heet 4.

(No Model.)

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NITE STATES HARRY SHOEMAKER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO MARIE V. GEHRING, OF PHILADELPHIA, PENNSYLVANIA, AND AMERI- CAN WIRELESS TELEPHONE & TELEGRAPH COMPANY, A CORPORA- TION OF ARIZONA TERRITORY.

WlRELESS-TELEG RAPH SYSTEM.

SPECIFICATION forming part of Letters Patent No. 710,122, dated September 30, 1902. Application filed January 11, 1902. Serial No. 89,249. (No model.)

To all whom it may concern:

Be it known that 1, HARRY SHOEMAKER, a citizen of the United States, residing atPhiladelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and useful lVireless lelegraph System, of which the following is a specification.

My invention relates to electrical communication between several stations without the use of the usual artificial connecting conductors, the energy being impressed upon and transmitted through the natural media.

It comprises apparatus and the arrangement of circuits whereby certain new and useful results are obtained in a wireless signaling system.

It consists, further, of a decoherer or tapper capable of very accurate and fine adjustment, an arrangement whereby the wave-responsive device is perfectly shielded and protected from injury during the time of transmittal of a signal or message, an electromagnetic switch for throwing the conductor, upon or from which the electromagnet or electrostatic energy, orboth, is received or radiated, into comm unication with the receiving or sending instrument at the will of the operator, an interrupter for the primary circuit of the transmitting-transformer particularly useful in the art of the wireless signaling, a simple operators switch and keyboard from which all transmitting and receiving apparatus is controlled, and, further, new and useful improvements ina wireless signaling system described in connection with the drawings and pointed out in the annexed claims.

For a detailed description of my system and apparatus reference is to be had to the accompanying drawings, in which- Figure 1 represents a plan view of the receiving apparatus assembled on a common base. Fig. 2 is a side elevation of Fig. 1. Fig. 3 is an elevation of the magnets for cutting out of circuit the coherer and the adjustable tapping device on the interior of a box. Fig.

l is a side elevation of the tapping device and supporting-frame and adjusting means. Fig. 5 is a plan View of the operators switch and keyboard. Fig. 6 is a front elevational View of the electromagnetic switch for throwing the receiving or transmitting instrument into communication with the receiving and radiating conductor. Fig. 7 is a side elevation of the switch shown in Fig. 6. Fig. 8 is a plan view of the interrupter for the primary of the transformer and the associated driving-motor. Fig. 9 is a side elevation of the interrupter. Fig. 10 is a detail of one element of the interrupter. Fig. 11 isa diagram of the connections of the entire instrument.

A represents a base, of wood or other material, npon which are assembled the box B, containing the coherer and tapping device and having supported on its sides the coherer cut-outs, a box or receptacle O, in which are contained the poralization-cells hereinafter mentioned, the main polarized relay D, the supplemental relay E, and the box F, containing non-inductive shunts, and a Morse recorder G. The relay E is of the ordinary neutral type and has its magnets so wound as to have a high time constant-that is, the relay E is sluggish as compared with the main polarized relay D. Upon the deenergization of the relay D the armature is released from circuit-closing position in the manner well known in polarized relays, and upon the deeuergization 0f the magnets of E the armature is retracted from circuit-closing position by means of a sma-l spiral spring, as appearing in Fig. l.

l and 2 represent posts, to which are connected the terminals of the coherer or by means of flexible conductors 55 and 56.

. 3 and 4 are the armatures of the magnets 5 and 6, respectively, which armatures connect to posts '7 and 8, respectively.

9 and 10 are binding-posts on the rear of box B, which connect to the tapper or decoherer.

11 and 12 are the binding-posts of polarized relay D, which connect to the coils of said relay.

13 and 14 are the binding-posts connecting .to the break controlled by the relay.

15 and 16 are the binding-posts of relay E,

connected to the magnet-coils, while 17 and 18 are binding-posts connected to the breakcontacts of said relay.

19 and 20 are the bindi ng-posts of the Morse register.

21 and 22 are the terminals of one non-inductive resistance, 23 and 24 of another, and posts 25 and 26 of still another non-inductive resistance.

27 and 28 are binding-posts to which are connected from the exterior conductors leading from a battery or source of energy a.

29 and 30 receive conductors from another source of energy 0.

31 and 32 are the binding-posts to which are connected conductors leading from the main battery and through the operators switch to and including magnets 5 and 6.

In Fig. 3, 54 represents the lid of the box B. Flexible conductors 55 and 56, as before mentioned, connect to the terminals of the coherer 64 and the posts 1 and 2, respectively. Magnets 5 and 6 are supported on the side of the'box B by brackets 53, and through the posts 1 and 2 extend adjusting-screws for the armatures 3 and 4, which are retracted by spring 57, adjustable by screw 58.

59 is a standard secured to the base A inside of the box 13 and having a horizontal projection terminating in two jaws 60, having a lining of soft material 61 and 62, said jaws being forced together by screws 63 to clasp and hold firmly the coherer 64.

65 is a small ball or other mass secured to and operated by the armature 66, adjusted in position by screw 67 and acted upon by magnet 68, having back armature 69, secured mechanically to but insulated from bracket 70. The bracket 70 is secured to a vertical plate 71, which in turn is secured to the horizontal plates or arms 72 and 73, which are perforated to permit their free vertical movementover the rods 74 and 75. I/Vith the horizontal member 73 cooperates the adjustingscrew 76, which is tapped through the upper horizontal member 78 and to which the ver' tical rods 74 and 75 are secured and which at their other ends are secured to member 77. Byan adjustment of the screw 76 it is apparent, therefore, that the whole tapper mechanism is movable in a vertical direction, by which may be secured a very delicate adjustment of both the extent of move ment ot' the armature 66 and its relative position to thecoherer 64. The magnets 68 are connected by flexible conductor to bindingpost 9, the other terminal connecting to armature 66, and from contact-screw 67 the flexible conductor extends to binding-post 10. In Fig. 5 is shown a base H, comprising an operators table, of insulating material, on which is secured the key 79 of the usual Morse type, Whose'terminals connect with the binding-posts 39 and 40. On the same base is located the operators switch, com prising a conducting member 80, pivoted thereto and operated by handle 91. Upon the same spindle is the insulating member 81, upon which is adapted to rest at "certain times the spring-contact 83, secured to post 82 in the circuit of the motor.

84 and 85 are two metallic segments, over which the upper end of the member sweeps, the member 84 being connected to bindingpost 33, while member is dead-in other words, does not connect electrically with anything.

86, 87, 88, 89, and are metallic contacts insulated from each other and of which 86 and 88 are dead.

87, 89, and 90 connect, respectively, with binding-posts 30, 37, and 38.

In Fig. 6 is shown an electromagnetic switch for throwing the receiving or transmitting apparatus at the will of the operator into connection with the receiving and radiating conductor. It comprises a plate of insulating material I, which is supported upon the base 92 by standards 93.

94 and 95 are solenoid-coils included in separate circuits and with which cooperate, respectively, the cores 94" and 95, to which are secured, respectively, the rack-bars 96 and 97,0finsulating material,which cooperate with pinion 98. These bars 96 and 97 have a guideway through insulating-plate 99. On the shaft of pinion 98 is secured the insulating-disk 100 between the plate I and the insulatingplate 101. Upon the insulatingdisl: 100 is secured the switch-arm 102, which has electrical communication through the spring-contact 103 with the binding-post 46. At the lower end of plate I are binding-posts 44 and 45, to which are secured the contacts with which switch-arm 102 engages in itsdifferent positions.

41, 42, and 43 are binding-posts upon the base 92, communicating with the solenoidcoils 94 and 95.

In Fig. 8 I have shown mounted upon a baseboard J an electric motor K, whose terminals are at binding-posts 47 and 48. Motor K drives an interrupter (shown at L) through the medium of belt 104, running upon pulleywheel 105, secured to shaft 106, running in journal 107 at the upper end of a standard. At the end of the shaft 106 opposite to the pulley-wheel is an eccentric 108, which in its rotation comes into mechanical engagement with the disk 109, pressed toward the right by spring 110, which disk is secured to rod or plunger 111, operating through the bearing 113, but in a direction at right angles to the shaft 106. The member 111 carries at the right end a similar smaller portion 112, on the end of which is the terminal 114, forming one contact of the interrupting device. The two portions 107 and 113 of the bracket 126 are secured by screws 127 to a vertical standard, and such brackets 107 and 113 are insulated therefrom.

115 is the remaining contact of the interrupter and is secured by nuts 117 to a bladespring 116, secured at its lower extremity to the rocking member 118, secured to pinion 119 at one end. The other end of said pinion 119 is secured to member 120, carrying the armature 121, by means of a screw 122. The pinion or shaft 119 has a horizontalbearing in a standard 125, extending vertically from the base of the interrupter.

123 indicates a'spring tending to rotate the contact 115 in a clockwise direction, said spring being secured adjustably to upright 124.

128 represents magnet-coils whose core attracts the armature 121, said coils being in a circuit controlled by the Morse key 79.

129 is a base carrying the movable armature 121 and its associated contact 115 along with-the magnets 128 and has a slidable connection with portion 130.

131 is an adjusting-screw secured to the base and securedto lug 132 on the member 129, whereby the relative positions of the contacts 114 and 115 may be adjusted.

51 and 52 are binding-posts for the terminals of the interrupter, and 49 and 50 are the terminals of the magnets 128.

The operation of the interrupter is as follows: Motor K rotates the shaft 106 and its associated eccentric 108. Eccentric 108 during a certain portion of every revolution is in mechanical engagement with the disk 109 and forces it at the same time imparting a rotary motion thereto to the left and is restored by a spring 110. This combined rotative and longitudinal motion of one contact of the breaker insures new portions of the contact 114 coming successively into contact with 115 and makes a contact which is both certain and elastic. The elasticity of the contact is further enhanced by the flexible support of 115 upon the spring 116. Then the operator depresses key 79, magnets 128 are energized, with the resulting attraction of armature 121 against the opposing force of spring 123, which causes the contact 115 to move toward the left and come into the path of movement of 114, whose motion to the right is limited by the shoulder 111 on the rod 112;

In Fig. 11 is shown a diagrammatic arrangement of .the apparatus and circuit-s, and the characters are the. same as in the remaining views of the drawings. The non-inductive shunts assembled in box F connect across the terminals of the windings of the relays D and E, respectively, and the terminals of the windings of the magnet 68. The presence of these shunts prevents an undesirable influence upon the wave-responsive device by the successive denergization of the magnetic windings. In shunt to the breaks at the tapper and relays D and E are a series of small polarized cells, (representedat c and inclosed in box 0.) The object of these is to prevent sparking at said contacts,which would result otherwise in the generation of radiant energy likely to affect the wave-responsive device and give a false signal.

In the position of the switch 80 shown the apparatus is in condition for transmitting. From one terminal of the batteries ab,whieh are connected in series, leads a conductor to binding-post 34 and the central pivot, upon which is mounted the switch-arm 80. The current flows through this conductor and switch-arm 80, through segment 84, bindingpost 33 to post 52 of the interrupter, through the interrupter to post 51, through primary of the sending-transformer, (indicated at 19,) and back to the remaining terminal ofthe battery. Current from the same battery flows through the spindle upon which switch-arm 80 is mounted, through an enlargement of such switch-arm, as shown in Fig. 5, through a brush 83 to post 82, binding-post 35, post 47 of motor K, through the motor to post 48, and back to the remaining terminal of the battery. Current also flows from the section I) of the battery through switch-blade 80, post 38, and through binding-post 31, magnets 6 and 5, binding-post 32, and back to the remaining terminal of the battery.

This re:

sults in an energization of magnets 5 and 6,

causing an attraction of their respective armatures 3 and 4, rupturing the circuit of the coherer with the receiving conductor and earth. This prevents the burning out of the coherer or in any way influencing it by the message being transmitted. fore, that motor K is driving iheinterrupter, and upon depression of key 79 current flows from batteryb through said key, binding-post 50, magnets 128, binding-post'49, back to battery. This causes the armature 121 to carry forward the contact 115, as previously described, with a result of a series of sparks from the secondary s of the transformer at the spark-gap 8 so long as key 71 is held depressed. In moving the switch-blade 80 into the po-' sition shown it passed over segment 89, which It is seen, therein consequence received current from one terrninal of battery I) and supplied it through post 37 and post 43 to 'coil 94 of the electromagnetic switch, returning through post 42 to the remaining terminal of battery I). The resulting energization of coil 94 caused the rack-bar 96 to be drawn downward, causing a rotation of pinion 98 to throw the switchlever 102 into contact with post 44, therefore rupturing the connection between the receiv-.

-ther movement causes the arm 80 to pass over the dead sect-ion 88 and to contact with section 87, which then causes an energization of coil 95, which results in throwing contactarm 102 into contact 45. Upon further movement coil 95 is deenergized and the switch-arm rests on dead sections and 86. By the initial movement in a clockwise direction of said arm 80 magnets 5 and 6 are deenergized and the coherer 64 is thrown into circuit with armatures 3 and 4 and upon 102 coming in contact with 45 is prepared to receive energy from the aerial conductor X. It is to be stated,

further, that this clockwise rotation of switcharm 80 causes brush 83 to break metallic contact therewith and to rest upon insulating member 81. It therefore causes the motorK to come to rest. Upon the reception of energy upon the aerial conductor X the coherer 64 loses its resistance, permitting a flow of energy from battery a through it and the coils of the polarized relay D. The consequent movement of the armature of said relay D closes a circuit supplied by battery 0?, which energizes the trembler-tapper 68 and also the coils of the relay E. The armature of the lastmentioned relay then closes the circuit of the recorder G,- which is also energized from battery a As is well known, upon mechanical shock being administered to coherer 64 it regains its resistance and is in condition for the reception of succeedingimpulses. Upon the deenergization of the relay-coils the armatures are retracted by the usual springs. The motion of the armature of the relay D is barely perceptible to the naked eye and being very delicately poised may often make instantaneous contact when the coherer has not been influenced or'when the coherer has been influenced for a mere instant by stray radiant energy or the like. By making the relay E sluggish, however, its magnets have not sufficient time under these circumstances to build up and operate the recording-circuit. In other words, by making the relay E sluggish false signals are prevented.

It is tobe understood that the apparatus and system herein shown and described are not limited to the employment of a coherer only, but that any form of wave-responsive device may be used; nor is itlimited to a systern employing an aerial conductor only, but may be used'in those systems wherein a plurality of aerial conductors are required or Where the receiving and transmitting conductors connect toearth only. Furthermore, my system may be used as a selective one when the receiving-circuit is properly tuned to the transmitted waves, as is easily accomplished by those skilled in the art of wireless signaling. Nor is it necessary to use the specific kind of transmitter shown, inasmuch as for the battery and induction-coil shown may be used a source of alternating current derived either from a transformer or from an alternating generator itself, and the spark-gap S may be omitted.

What I claim is 1. In a Wireless signaling system the combination of a conductor for receiving the energy from the natural media, a wave-responsive device influenced by the received energy, a main polarized relay controlled by said wave-responsive device, a second sluggish relay controlled by the main polarized relay and a recording device controlled by the second relay. 7

2. In a wireless signaling system the combination of a conductor for receiving the energy from the natural media,a wave-responsive device in communication with said condoctor, a main polarized relay controlled by said wave-responsive device, a second sluggish relay and tapping device controlled by said main polarized relay and a recording device controlled by the second relay.

3. In a wireless signaling system, the combination of a conductor for emitting energy into and receiving energy from the natural media, a switch-blade in communication with said conductor, solenoids operative to throw said switch-blade into communication with either the receiving or sending apparatus, an operators switch, and a segment on said switch in series with a source of energy and said solenoids.

4. A switch for wireless signaling system comprising an insulating-plate, arotaryspindle mounted on said plate and carrying a switch-arm and a pinion in connection with said spindle, a connection-from the receiving and transmitting conductor and contacts on said insulating-plate engaged alternately by said switch-blade in putting the conductor into communication with the transmitter or receiver.

' 5. A switch for wireless signaling system comprising an insulatingplate, a rotary spindle mounted on said plate andcarrying a switch-arm, and a pinion in connection with said spindle, a connection from the receiving and transmitting conductor and contacts on said insulating-plate engaged alternately by said switch-blade in putting the conductor into communication with the transmitter or receiver, and solenoids and rack-bars cooperating with the pinion.

' 6. In a wireless signaling system, a receptacle for inclosing a Wave-responsive device and its tapper, electromagnetic means out- IIO side said receptacle and mounted onthe walls thereof for entirely removing the Wave-responsive device from the receiving-circuit.

7. In a wireless-telegraph system the combination with the walls of a receptacle of electromagnets mounted on said Walls, armatu res for said electromagnets,contacts in communication with the terminals of the waveresponsive device and means for causing at a predetermined time the attraction of said brush adapted to engage with said switch-arm in a predetermined position.

9. In a signaling system, a transmitting and receiving conductor, means for putting said conductor-into communication with either the transmitter or receiver, said means comprising a switch,apinion for operating said switch, rack-bars meshing with said pinion, solenoids operating the rack-bars, and means for energizing a solenoid when changing the character of the station.

10. In a signaling system, a transmitting and receiving conductor, means for putting said conductor into communication with either the transmitter or receiver, said means comprising a switch, a pinion for operating said switch, rack-bars meshing with said pinion, solenoids operating the rack-bars, and means for momentarily energizing a solenoid when changing the character of the station.

11. In a signaling system, a transmitter and a receiver, means for putting either into communication with the radiating and absorbing conductor, electromagnetic means for operating said means, and means for energizing the electromagnetic means momentarily when changing the character of the station.

12. In a wireless signaling system, a transmitter and receiver, and an operators switch having a contact in the circuit of the waveproducing means, an interrupter, a motor for driving the same, and a contact in the circuit of the interrupter-motor.

13. In a wireless signaling system, a transmitter, a receiver, an operators switch for bringing either into action, a wave-producing means, a contact of said switch in the circuit of said wave producing means, an interrupter-motor for said wave-producin g means, and a contact of said switch in the circuit of said interrupter-motor.

14. In a wireless signaling system, a conductor, a transmitter and receiver, circuits for bringing each into action, an operators switch controlling said circuits, and having a segment in the circuit of the wave-producing device.

15. In a wireless signaling system, a conductor, a transmitter, a motor driving the interrupter, an operators switch for putting the transmitter into operative relation with said conductor, and having a contact in the circuit of the wave-producing means and another in the circuit of the interrupter-motor.

16. In awireless signaling system, a conductor, a transmitter, a motor driving the interrupter, an operators switch for putting the transmitter into operative relation with said conductor, and having a contact in the circuit of the interrupter-motor and another in the circuit of means for putting the transmitter into communication with the radiator.

17. In a wireless signaling system, a transmitter, means for putting the transmitter into communication with the radiator, an operators switch having a contact in the circuit of a wave-producing means and another in the circuit of the means for putting the transmitter into communication with the radiator.

18. In a wireless signaling system, a receiver, electroresponsive means for putting the receiver into communication with the aerial conductor, an operators switch, and a contact of said'switch in a circuit for energizing said electroresponsive means.

19.'In a wireless signaling system, a receiver and an operators switch having a contact in the circuit of means for isolating the wave-responsive device, and another contact in a separate circuit of means for removing the receiver from communication with the receiving-conductor.

20. In a wireless signaling system, a receiver, means for putting the receiver into comm u nication with the receiving-conductor, an operators switch having a contact in the circuit of means for isolating the wave-responsive device, and another contact in the circuit of said means for putting the receiver into communication with the receiving-conductor.

21. In a wireless signaling system, a transmitter in combination with electromagnetic means for removing the receiver from communication with the radiating conductor, and an operators switch having acontact in the circuit of said electromagnetic means.

22. In a wireless signaling system, a transmitter in combination with an operators switch having a contact in the circuit of waveproducing means and another contact in a separate circuit of means for removing the receiver from communication with the radiating-conductor.

23. In a wireless signaling system, a receiver in combination with electromagnetic means for removing the transmitter from communication with the radiatingconductor, and an operators switch having a contact in the circuit for energizing said means.

24. In a wireless signaling system, a receiver in combination with means for isolating the wave-responsivedevice, means for removing the transmitter from communication with the radiating-conductor, and an operators switch having contacts in the circuits of said means.

25. In a wireless signaling system, a receiver in combination with an operators switch' having a contact in the circuit of means for isolating the wave-responsive de vice and another contact in a separate circuit of means for putting the transmitter'into communication with the radiating-conductor.

26. In a wireless signaling system, a transmitter comprising in part a transformer, an interrupter in the primary of said transformer comprising a reciprocating contact and a movable contact, and an operators key controlling a circuit for bringing said movable contact into the path of the reciprocating contact.

ICC

27. In a wireless signaling system, a transmitting-transformer, a reciprocating contact in a winding thereof, a contact movable into the path of the reciprocating contact, an operators key, and means controlled by said key for causing engagement of the contacts.

28. In a Wireless signaling system, a transmitting-transformer, a reciprocating contact in a Winding thereof, a contact movable into the path of said reciprocating contact, an operators key, and electromagnetic means controlled by said key for bringing the contacts into engagement.

29. In a wireless signaling system, a key, a transmitter comprising in part a transformer, an interrupter in the primary of said transformer comprising a reciprocating and rotating contact, and a contact movable into the path of the reciprocating contact under the control of said key.

30. In a wireless signaling system, a key, a transmitting-transformer,a reciprocating and rotating contact in a winding thereof, a contact movable into the path of the reciprocating contact, and means controlled by said key for causing engagement of the contacts.

31. In a wireless signaling system, a key, a transmitting-transformer,areciprocatingand rotating contact in a winding thereof, a contact movable into the path of said reciprocating contact, and electromagnetic means controlled by said key for bringing the contacts into engagement.

32. In a wireless signaling system, a key, a transmitting'transformena reciprocatingcontact in the circuit of a winding thereof, a motor for driving said contact, a movable contact, means controlled by said key for bringing the movable contact into the path of a reciprocating contact, and an operators switch having a contact in the circuit of said motor.

33. In a wireless signaling system, a key, a transmitting-transformer,areciprocatingcontact in the circuit of a Winding thereof, a motor for driving said contact, a movable contact, means controlled by said key for bringing the movable contact into the path of the reciprocating contact, means for putting the transmitter into communication with the radiating-conductor, and an operators switch having a contact in the circuit of said motor and another in the circuit of said means for putting the transmitter into communication with the radiating-conductor.

34. In a Wireless signaling system, a key, a transmitting-transformer, a reciprocating contact in the circuit of a winding thereof, a motor for driving said contact, a movable contact, means controlled by said key for bringing the movable contact into the path of the reciprocating contact, means for putting the transmitter into communication with the radiating-conductor, means for isolating the wave-responsive device, and an operators switch having a contact in the circuit of said motor, another contact in the circuit of said means for putting the transmitter into communication with the radiating-conductor,and a third contact in the circuit of said means for isolating the wave-responsive device.

35. In a receiver, aways-responsive device, a relay controlled thereby, a sluggish relay controlled by said relay, arcircuit controlled by said sluggish relay and an electrolytic cell connected across the terminalsof said circuit, for the purpose described.

36. In areceiver, a wave-responsive device, a relay controlled thereby, a sluggish relay controlled by said relay, a circuit controlled by said sluggish relay and an electrolytic cell connected across the break of each relay, and a resistance in shunt to the winding of each relay, for the purpose described.

37. In a receiver, a wave-responsive device, a relay controlled thereby, a second sluggish relay controlled by said relay, and a recorder controlled by the second relay, for the purpose described.

38. In a receiver, a Wave-responsive device, a relay controlled thereby, a second sluggish relay controlled by said relay, and a recorder controlled by the second relay and electrolytic cells connected across the relay-breaks, for the purpose described.

39. In a receiver, a wave-responsive device, a relay controlled thereby, a second sluggish relay controlled by said relay, a recorder controlled by the second relay, and a resistance in shunt to each relay-winding.

40. In a receiver, awave-responsive device,

a relay controlled thereby, a second sluggish relay controlled by said relay, a recorder controlled by the second relay, electrolytic cells connected across the relay-breaks, and a resistance in shunt to each relay-winding.

41. In a wireless signaling system, a key and switch juxtaposed, a generator, said key controlling said generator, electroresponsive means for removing the receiver from electrical communication with the radiating-conductor, and a contact on said switch for energizing said electroresponsive means.

42. In a wireless signaling system, an operators table, a key and switch mounted thereon, a radiating and absorbing conductor, a transmitter, a receiver, electroresponsive means for removing the receiver from communication with said conductor, and a contact of said switch controlling the circuit for energizing said electroresponsive means.

43. In a wireless signaling system, an operators table, a key and switch located thereon, a radiating and absorbing conductor, a transmitter, said key controlling said transmitter, electroresponsive means for disconnecting said transmitter from said conductor and placing the receiver in communication with said conductor, and a contact on said switch and controlling the circuit for energizing said electroresponsive means.

44.. In a wireless signaling system, an operators table, a key and switch juxtaposed thereon, a transmitter, a receiver, a radiating and absorbing conductor, electroresponsive means for placing the transmitter in operative relation with said conductor, electroresponsive means for isolating the receiver, and contacts on said switch controlling the circuits of said electroresponsive means.

45. In a wireless signaling system, an operators switch, a source of radiant energy, an interrupter in a circuit of said source, a key for controlling said interrupter, a motor driving said interrupter, a source of energy, a connection from said source to a member of said switch, a segment of said switch momentarily engaged by the switch member and in the circuit of means for disconnecting the receiver and connecting the source of radiant energy to the radiating-conductor, a segment controlling the circuit including the interrupter, a contact in the circuit of said motor, and a segment in the circuit of means for isolating the wave-responsive device.

a6. In a wireless signaling system, an interrupter, a motor for driving the same, an operators switch comprising an arm and a plurality of contacts engageable thereby, a source of energy, a connection from said source to said switch-arm, a contact of said switch controlling the interrupter-motor, and a contact in the circuit of the interrupter.

47. In a wireless signaling system, a waveresponsive device, a receptacle inclosing the same, connections from said wave-responsive device to contacts located on the walls of said receptacle, a receiving-conductor, an earth-conductor,and electroresponsive means for removing said contact from electrical comm u nication with said cond uctors.

48. In a signaling system, a wave-respom' sive device, a tapper therefor, a relay controlled by said wave -responsive device, a sluggish relay con trolled by said relay, and an electrolytic cell in shunt to the break of said tapper and each of said relays.

49. In a wireless signaling system, a waveresponsive device, a tapper therefor, a relay controlled by said wave-responsive device, a sluggish relay controlled by said relay, and a resistance in shunt to the winding of said tapper and to the winding of each of said relays.

50. In a wireless signaling system, a waveresponsive device, a relay controlled thereby, a sluggish relay controlled by said relay, and a recorder controlled by said sluggish relay, for the purpose described.

51. In a wireless signaling system, a waveresponsive device, a relay controlled thereby, a sluggish relay controlled by said relay and energized by a source of energy, and a recorder controlled by said sluggish relay and operated by said source of energy.

52. In a wireless signaling system, a waveresponsive device, a polarized relay controlled thereby, a sluggish relay controlled by the polarized relay and a Morse register controlled by said sluggish relay.

HARRY SI'IOEMAKER.

\Vitnesses:

MAE I-IoFMANN, J. E. ENICH. 

